Hydrochloric acid

        Hydrochloric acid is the most interesting compound in my opinion because it is extremely dangerous if in acid state. Although it's so powerful it's in your stomach, now thats scary! It was disovered in pure form in 1772 and was discovered to be made of hydrogen and chloride in 1818. During the industrial revolution Hydrogen chloride was used a lot in things like alkaline substances. In the twentieth century it has been strictly restricted for everyday people for its uses in cocaine, heroin, and meth. One of the most important uses of the compound is steel pickling which is removing rust, lime, etc. from steel. Hydrochloric is probably in your house somewhere because it is in lots of cleaning supplies and is very common in a low percentage of the acid. If it was the pure comound it would dissolve the botttle instantaneously. Hydrochloric acid is definitely the most interesting compound.
sources- wikipedia.org